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Pair of collimator magnets in wooden carier

Short steel bar magnet

1900-1980

Collection of six ball-ended magnets

1900-1983

Magnets rotating round a current

1822-1856

Two ferrite loudspeaker ring magnets

1981

Pair of bar magnets

Magnetic disc record type 3011 made by W. Assman at Bad Homburg

1949

Bar magnets

1926-1940

Large magnet

1872

Selection of permanent magnets

1970

Pair of bar magnets

Pair of bar magnets

Pair of collimator magnets, ex Kew Observatory

Magnets with quote by Stephen Hawking

2012-2018

Pair of magnetic floater magnets

1981

Magnetical magazine, twelve magnets in case

1753

Magnet rotating on its own axis

1822-1856

Eclipse laboratory set of permanent magnets

1950-1980

Short steel bar magnet

1900-1980

Short steel bar magnet

1900-1980

Horseshoe magnet 170mm long

1900-1960

Horseshoe magnet 210mm long

1900-1960

Portable pivoted horse-shoe magnet type galvanometer

1890

Magnet to show construction

Magnet, metal, U-shaped, European, 19th century

1801-1900

Magnet, cuboid block, magnets on base

1801-1900

Magnet in case

1801-1850

Firle eye magnet in case

Two pairs of bar magnets with keepers in fitted box

1877-1904

Four pairs of small steel magnets

1900-1983

2 steel horseshoe magnets

1890-1910

Set of 'Artificial' Magnets, c. 1762

1762
Russian lodestone and coil used with it by Faraday

Professor Daniell's lodestone used by Faraday in 1831

1777
Fellows magneto type EM4, No.6740, sectioned

Motor car magneto

Two bar magnets with pair of keeps in wooden box, belonging to F.W. Ogg, European, early 20th century

Two bar magnets with pair of keeps in wooden box

1901-1930
Magnetic disc record type Universa 50, serial no. 24715, made by W. Assman at Bad Homburg, c. 1949

Magnetic disc record type Universa 50

1949
C.A.V., HN4, 4 cylinder magnet

C.A.V., HN4, 4 cylinder magnet

1931 design 'enclosed pot' cobalt steel permanent magnet for moving coil loud speaker

1931 design 'enclosed pot' cobalt steel permanent magnet

1931
1931 design 'assembled' cobalt steel permanent magnet for moving coil loud speaker

1931 design 'assembled' cobalt steel permanent magnet

1931
1931 design 'M' shape cobalt steel permanent magnet for moving coil loud speaker

1931 design 'M' shape cobalt steel permanent magnet

1931
1931 design: 'four claw' cobalt steel permanent magnet, for moving coil loud speaker.

1931 design: 'four claw' cobalt steel permanent magnet

1931
Three bar magnets

Three bar magnets

Du Bois-Reymond's compensating magnet. It allowed the one operating a galvanometer to fine-tune its sensitivity by repositioning a permanent magnet as necessary in order to compensate wholly or partially for the Earth's magnetic pull on the galvanometer needle. The wooden guide was affixed to the center of the galvanometer and could rotate freely; the magnet, in a brass mount, could be precisely positioned at any distance from the center. A pulley and string arrangement allowed the operator to adjust the magnet on the fly while seated a distance away at the reading telescope.

Du Bois-Reymond's galvanometer-compensating magnet

1876
Sherardised magnet

Sherardised magnet

Magnet, horseshoe, in wooden case, used by linemen for resetting and remagnetising early telegraph instruments

Magnet, in wooden case used by linemen for resetting early telegraph instruments

Four coil resistive magnet (0.1 Tesla) made by Walker Scientific used in MRI Experiments at EMI, mid 1970s to early 1980s

Four coil resistive magnet (0.1 Tesla) used in MRI

1975-1983